1 /* Operating system specific defines to be used when targeting GCC for some
2 generic System V Release 4 system.
3 Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@segfault.us.com).
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA.
23 To use this file, make up a file with a name like:
27 where ????? is replaced by the name of the basic hardware that you
28 are targeting for. Then, in the file ?????svr4.h, put something
34 followed by any really system-specific defines (or overrides of
35 defines) which you find that you need. For example, CPP_PREDEFINES
36 is defined here with only the defined -Dunix and -DSVR4. You should
37 probably override that in your target-specific ?????svr4.h file
38 with a set of defines that includes these, but also contains an
39 appropriate define for the type of hardware that you are targeting.
42 /* Define a symbol indicating that we are using svr4.h. */
45 /* For the sake of libgcc2.c, indicate target supports atexit. */
48 /* Cpp, assembler, linker, library, and startfile spec's. */
50 /* This defines which switch letters take arguments. On svr4, most of
51 the normal cases (defined in gcc.c) apply, and we also have -h* and
52 -z* options (for the linker). Note however that there is no such
53 thing as a -T option for svr4. */
55 #define SWITCH_TAKES_ARG(CHAR) \
68 /* This defines which multi-letter switches take arguments. On svr4,
69 there are no such switches except those implemented by GCC itself. */
71 #define WORD_SWITCH_TAKES_ARG(STR) \
72 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
73 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
74 && strcmp (STR, "Tbss"))
76 /* You should redefine CPP_PREDEFINES in any file which includes this one.
77 The definition should be appropriate for the type of target system
78 involved, and it should include any -A (assertion) options which are
79 appropriate for the given target system. */
82 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
83 many of the specialized svr4 assembler options as seems reasonable,
84 given that there are certain options which we can't (or shouldn't)
85 support directly due to the fact that they conflict with other options
86 for other svr4 tools (e.g. ld) or with other options for GCC itself.
87 For example, we don't support the -o (output file) or -R (remove
88 input file) options because GCC already handles these things. We
89 also don't support the -m (run m4) option for the assembler because
90 that conflicts with the -m (produce load map) option of the svr4
91 linker. We do however allow passing arbitrary options to the svr4
92 assembler via the -Wa, option.
94 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
100 "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
102 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
103 the -o option (and its argument) for some reason. If we try to put it
104 before the -o option, the assembler will try to read the file named as
105 the output file in the -o option as an input file (after it has already
106 written some stuff to it) and the binary stuff contained therein will
107 cause totally confuse the assembler, resulting in many spurious error
110 #undef ASM_FINAL_SPEC
111 #define ASM_FINAL_SPEC "%{pipe:-}"
113 /* Under svr4, the normal location of the `ld' and `as' programs is the
114 /usr/ccs/bin directory. */
116 #ifndef CROSS_COMPILE
117 #undef MD_EXEC_PREFIX
118 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
121 /* Under svr4, the normal location of the various *crt*.o files is the
122 /usr/ccs/lib directory. */
124 #ifndef CROSS_COMPILE
125 #undef MD_STARTFILE_PREFIX
126 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
129 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
130 standard C library (unless we are building a shared library). */
133 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
135 /* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude
136 libgcc when -symbolic. */
139 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
141 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
142 magical crtend.o file (see crtstuff.c) which provides part of the
143 support for getting C++ file-scope static object constructed before
144 entering `main', followed by the normal svr3/svr4 "finalizer" file,
145 which is either `gcrtn.o' or `crtn.o'. */
148 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
150 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
151 for the special GCC options -static, -shared, and -symbolic which
152 allow us to link things in one of these three modes by applying the
153 appropriate combinations of options at link-time. We also provide
154 support here for as many of the other svr4 linker options as seems
155 reasonable, given that some of them conflict with options for other
156 svr4 tools (e.g. the assembler). In particular, we do support the
157 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
158 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
159 by gcc.c itself. We don't directly support the -m (generate load
160 map) option because that conflicts with the -m (run m4) option of
161 the svr4 assembler. We also don't directly support the svr4 linker's
162 -I* or -M* options because these conflict with existing GCC options.
163 We do however allow passing arbitrary options to the svr4 linker
164 via the -Wl, option. We don't support the svr4 linker's -a option
165 at all because it is totally useless and because it conflicts with
168 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
170 When the -G link option is used (-shared and -symbolic) a final link is
175 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
177 %{static:-dn -Bstatic} \
178 %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
179 %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
184 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
186 %{static:-dn -Bstatic} \
187 %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
188 %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
191 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
192 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
196 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
197 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
198 link step (depending upon the other gcc options selected, such as
199 -traditional and -ansi). These files each contain one (initialized)
200 copy of a special variable called `_lib_version'. Each one of these
201 files has `_lib_version' initialized to a different (enum) value.
202 The SVR4 library routines query the value of `_lib_version' at run
203 to decide how they should behave. Specifically, they decide (based
204 upon the value of `_lib_version') if they will act in a strictly ANSI
205 conforming manner or not.
208 #undef STARTFILE_SPEC
209 #define STARTFILE_SPEC "%{!shared: \
211 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
212 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
213 %{ansi:values-Xc.o%s} \
215 %{traditional:values-Xt.o%s} \
216 %{!traditional:values-Xa.o%s}} \
219 /* Attach a special .ident directive to the end of the file to identify
220 the version of GCC which compiled this code. The format of the
221 .ident string is patterned after the ones produced by native svr4
224 #define IDENT_ASM_OP ".ident"
226 #define ASM_FILE_END(FILE) \
228 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
229 IDENT_ASM_OP, version_string); \
232 /* Allow #sccs in preprocessor. */
234 #define SCCS_DIRECTIVE
236 /* Output #ident as a .ident. */
238 #define ASM_OUTPUT_IDENT(FILE, NAME) \
239 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
241 /* Use periods rather than dollar signs in special g++ assembler names. */
243 #define NO_DOLLAR_IN_LABEL
245 /* Writing `int' for a bitfield forces int alignment for the structure. */
247 #define PCC_BITFIELD_TYPE_MATTERS 1
249 /* Implicit library calls should use memcpy, not bcopy, etc. */
251 #define TARGET_MEM_FUNCTIONS
253 /* Handle #pragma weak and #pragma pack. */
255 #define HANDLE_SYSV_PRAGMA
257 /* System V Release 4 uses DWARF debugging info. */
259 #define DWARF_DEBUGGING_INFO
261 /* The numbers used to denote specific machine registers in the System V
262 Release 4 DWARF debugging information are quite likely to be totally
263 different from the numbers used in BSD stabs debugging information
264 for the same kind of target machine. Thus, we undefine the macro
265 DBX_REGISTER_NUMBER here as an extra inducement to get people to
266 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
267 (which is also used to provide DWARF registers numbers in dwarfout.c)
268 in their tm.h files which include this file. */
270 #undef DBX_REGISTER_NUMBER
272 /* gas on SVR4 supports the use of .stabs. Permit -gstabs to be used
273 in general, although it will only work when using gas. */
275 #define DBX_DEBUGGING_INFO
277 /* Use DWARF debugging info by default. */
279 #ifndef PREFERRED_DEBUGGING_TYPE
280 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
283 /* Make LBRAC and RBRAC addresses relative to the start of the
284 function. The native Solaris stabs debugging format works this
285 way, gdb expects it, and it reduces the number of relocation
288 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
290 /* When using stabs, gcc2_compiled must be a stabs entry, not an
291 ordinary symbol, or gdb won't see it. The stabs entry must be
292 before the N_SO in order for gdb to find it. */
294 #define ASM_IDENTIFY_GCC(FILE) \
297 if (write_symbols != DBX_DEBUG) \
298 fputs ("gcc2_compiled.:\n", FILE); \
300 fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
304 /* Like block addresses, stabs line numbers are relative to the
307 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
310 static int sym_lineno = 1; \
311 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
313 assemble_name (file, \
314 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
315 fprintf (file, "\n.LM%d:\n", sym_lineno); \
320 /* In order for relative line numbers to work, we must output the
321 stabs entry for the function name first. */
323 #define DBX_FUNCTION_FIRST
325 /* Generate a blank trailing N_SO to mark the end of the .o file, since
326 we can't depend upon the linker to mark .o file boundaries with
329 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
331 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
333 /* Define the actual types of some ANSI-mandated types. (These
334 definitions should work for most SVR4 systems). */
337 #define SIZE_TYPE "unsigned int"
340 #define PTRDIFF_TYPE "int"
343 #define WCHAR_TYPE "long int"
345 #undef WCHAR_TYPE_SIZE
346 #define WCHAR_TYPE_SIZE BITS_PER_WORD
348 /* This causes trouble, because it requires the host machine
349 to support ANSI C. */
350 /* #define MULTIBYTE_CHARS */
353 #define ASM_BYTE_OP ".byte"
356 #define SET_ASM_OP ".set"
358 /* This is how to begin an assembly language file. Most svr4 assemblers want
359 at least a .file directive to come first, and some want to see a .version
360 directive come right after that. Here we just establish a default
361 which generates only the .file directive. If you need a .version
362 directive for any specific target, you should override this definition
363 in the target-specific file which includes this one. */
365 #undef ASM_FILE_START
366 #define ASM_FILE_START(FILE) \
367 output_file_directive ((FILE), main_input_filename)
369 /* This is how to allocate empty space in some section. The .zero
370 pseudo-op is used for this on most svr4 assemblers. */
372 #define SKIP_ASM_OP ".zero"
374 #undef ASM_OUTPUT_SKIP
375 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
376 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
378 /* This is how to output a reference to a user-level label named NAME.
379 `assemble_name' uses this.
381 For System V Release 4 the convention is *not* to prepend a leading
382 underscore onto user-level symbol names. */
384 #undef ASM_OUTPUT_LABELREF
385 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
387 /* This is how to output an internal numbered label where
388 PREFIX is the class of label and NUM is the number within the class.
390 For most svr4 systems, the convention is that any symbol which begins
391 with a period is not put into the linker symbol table by the assembler. */
393 #undef ASM_OUTPUT_INTERNAL_LABEL
394 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
396 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
399 /* This is how to store into the string LABEL
400 the symbol_ref name of an internal numbered label where
401 PREFIX is the class of label and NUM is the number within the class.
402 This is suitable for output with `assemble_name'.
404 For most svr4 systems, the convention is that any symbol which begins
405 with a period is not put into the linker symbol table by the assembler. */
407 #undef ASM_GENERATE_INTERNAL_LABEL
408 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
410 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
413 /* Output the label which precedes a jumptable. Note that for all svr4
414 systems where we actually generate jumptables (which is to say every
415 svr4 target except i386, where we use casesi instead) we put the jump-
416 tables into the .rodata section and since other stuff could have been
417 put into the .rodata section prior to any given jumptable, we have to
418 make sure that the location counter for the .rodata section gets pro-
419 perly re-aligned prior to the actual beginning of the jump table. */
421 #define ALIGN_ASM_OP ".align"
423 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
424 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
425 ASM_OUTPUT_ALIGN ((FILE), 2);
428 #undef ASM_OUTPUT_CASE_LABEL
429 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
431 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
432 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
435 /* The standard SVR4 assembler seems to require that certain builtin
436 library routines (e.g. .udiv) be explicitly declared as .globl
437 in each assembly file where they are referenced. */
439 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
440 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
442 /* This says how to output assembler code to declare an
443 uninitialized external linkage data object. Under SVR4,
444 the linker seems to want the alignment of data objects
445 to depend on their types. We do exactly that here. */
447 #define COMMON_ASM_OP ".comm"
449 #undef ASM_OUTPUT_ALIGNED_COMMON
450 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
452 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
453 assemble_name ((FILE), (NAME)); \
454 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
457 /* This says how to output assembler code to declare an
458 uninitialized internal linkage data object. Under SVR4,
459 the linker seems to want the alignment of data objects
460 to depend on their types. We do exactly that here. */
462 #define LOCAL_ASM_OP ".local"
464 #undef ASM_OUTPUT_ALIGNED_LOCAL
465 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
467 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
468 assemble_name ((FILE), (NAME)); \
469 fprintf ((FILE), "\n"); \
470 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
473 /* This is the pseudo-op used to generate a 32-bit word of data with a
474 specific value in some section. This is the same for all known svr4
477 #define INT_ASM_OP ".long"
479 /* This is the pseudo-op used to generate a contiguous sequence of byte
480 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
481 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
483 #undef ASCII_DATA_ASM_OP
484 #define ASCII_DATA_ASM_OP ".ascii"
486 /* Support const sections and the ctors and dtors sections for g++.
487 Note that there appears to be two different ways to support const
488 sections at the moment. You can either #define the symbol
489 READONLY_DATA_SECTION (giving it some code which switches to the
490 readonly data section) or else you can #define the symbols
491 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
492 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
494 #define USE_CONST_SECTION 1
496 #define CONST_SECTION_ASM_OP ".section\t.rodata"
498 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
500 Note that we want to give these sections the SHF_WRITE attribute
501 because these sections will actually contain data (i.e. tables of
502 addresses of functions in the current root executable or shared library
503 file) and, in the case of a shared library, the relocatable addresses
504 will have to be properly resolved/relocated (and then written into) by
505 the dynamic linker when it actually attaches the given shared library
506 to the executing process. (Note that on SVR4, you may wish to use the
507 `-z text' option to the ELF linker, when building a shared library, as
508 an additional check that you are doing everything right. But if you do
509 use the `-z text' option when building a shared library, you will get
510 errors unless the .ctors and .dtors sections are marked as writable
511 via the SHF_WRITE attribute.) */
513 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
514 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
516 /* On svr4, we *do* have support for the .init and .fini sections, and we
517 can put stuff in there to be executed before and after `main'. We let
518 crtstuff.c and other files know this by defining the following symbols.
519 The definitions say how to change sections to the .init and .fini
520 sections. This is the same for all known svr4 assemblers. */
522 #define INIT_SECTION_ASM_OP ".section\t.init"
523 #define FINI_SECTION_ASM_OP ".section\t.fini"
525 /* A default list of other sections which we might be "in" at any given
526 time. For targets that use additional sections (e.g. .tdesc) you
527 should override this definition in the target-specific file which
528 includes this file. */
530 #undef EXTRA_SECTIONS
531 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
533 /* A default list of extra section function definitions. For targets
534 that use additional sections (e.g. .tdesc) you should override this
535 definition in the target-specific file which includes this file. */
537 #undef EXTRA_SECTION_FUNCTIONS
538 #define EXTRA_SECTION_FUNCTIONS \
539 CONST_SECTION_FUNCTION \
540 CTORS_SECTION_FUNCTION \
541 DTORS_SECTION_FUNCTION
543 #define READONLY_DATA_SECTION() const_section ()
545 extern void text_section ();
547 #define CONST_SECTION_FUNCTION \
551 if (!USE_CONST_SECTION) \
553 else if (in_section != in_const) \
555 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
556 in_section = in_const; \
560 #define CTORS_SECTION_FUNCTION \
564 if (in_section != in_ctors) \
566 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
567 in_section = in_ctors; \
571 #define DTORS_SECTION_FUNCTION \
575 if (in_section != in_dtors) \
577 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
578 in_section = in_dtors; \
582 /* Switch into a generic section.
583 This is currently only used to support section attributes.
585 We make the section read-only and executable for a function decl,
586 read-only for a const data decl, and writable for a non-const data decl. */
587 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
588 fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
589 (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
590 (DECL) && TREE_READONLY (DECL) ? "a" : "aw")
593 /* A C statement (sans semicolon) to output an element in the table of
594 global constructors. */
595 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
598 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
599 assemble_name (FILE, NAME); \
600 fprintf (FILE, "\n"); \
603 /* A C statement (sans semicolon) to output an element in the table of
604 global destructors. */
605 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
608 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
609 assemble_name (FILE, NAME); \
610 fprintf (FILE, "\n"); \
613 /* A C statement or statements to switch to the appropriate
614 section for output of DECL. DECL is either a `VAR_DECL' node
615 or a constant of some sort. RELOC indicates whether forming
616 the initial value of DECL requires link-time relocations. */
618 #define SELECT_SECTION(DECL,RELOC) \
620 if (TREE_CODE (DECL) == STRING_CST) \
622 if (! flag_writable_strings) \
627 else if (TREE_CODE (DECL) == VAR_DECL) \
629 if ((flag_pic && RELOC) \
630 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
631 || !DECL_INITIAL (DECL) \
632 || (DECL_INITIAL (DECL) != error_mark_node \
633 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
642 /* A C statement or statements to switch to the appropriate
643 section for output of RTX in mode MODE. RTX is some kind
644 of constant in RTL. The argument MODE is redundant except
645 in the case of a `const_int' rtx. Currently, these always
646 go into the const section. */
648 #undef SELECT_RTX_SECTION
649 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
651 /* Define the strings used for the special svr4 .type and .size directives.
652 These strings generally do not vary from one system running svr4 to
653 another, but if a given system (e.g. m88k running svr) needs to use
654 different pseudo-op names for these, they may be overridden in the
655 file which includes this one. */
657 #define TYPE_ASM_OP ".type"
658 #define SIZE_ASM_OP ".size"
660 /* This is how we tell the assembler that a symbol is weak. */
662 #define ASM_WEAKEN_LABEL(FILE,NAME) \
663 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
664 fputc ('\n', FILE); } while (0)
666 /* The following macro defines the format used to output the second
667 operand of the .type assembler directive. Different svr4 assemblers
668 expect various different forms for this operand. The one given here
669 is just a default. You may need to override it in your machine-
670 specific tm.h file (depending upon the particulars of your assembler). */
672 #define TYPE_OPERAND_FMT "@%s"
674 /* Write the extra assembler code needed to declare a function's result.
675 Most svr4 assemblers don't require any special declaration of the
676 result value, but there are exceptions. */
678 #ifndef ASM_DECLARE_RESULT
679 #define ASM_DECLARE_RESULT(FILE, RESULT)
682 /* These macros generate the special .type and .size directives which
683 are used to set the corresponding fields of the linker symbol table
684 entries in an ELF object file under SVR4. These macros also output
685 the starting labels for the relevant functions/objects. */
687 /* Write the extra assembler code needed to declare a function properly.
688 Some svr4 assemblers need to also have something extra said about the
689 function's return value. We allow for that here. */
691 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
693 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
694 assemble_name (FILE, NAME); \
696 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
698 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
699 ASM_OUTPUT_LABEL(FILE, NAME); \
702 /* Write the extra assembler code needed to declare an object properly. */
704 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
706 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
707 assemble_name (FILE, NAME); \
709 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
711 size_directive_output = 0; \
712 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
714 size_directive_output = 1; \
715 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
716 assemble_name (FILE, NAME); \
717 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
719 ASM_OUTPUT_LABEL(FILE, NAME); \
722 /* Output the size directive for a decl in rest_of_decl_compilation
723 in the case where we did not do so before the initializer.
724 Once we find the error_mark_node, we know that the value of
725 size_directive_output was set
726 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
728 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
730 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
731 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
732 && ! AT_END && TOP_LEVEL \
733 && DECL_INITIAL (DECL) == error_mark_node \
734 && !size_directive_output) \
736 size_directive_output = 1; \
737 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
738 assemble_name (FILE, name); \
739 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
743 /* This is how to declare the size of a function. */
745 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
747 if (!flag_inhibit_size_directive) \
750 static int labelno; \
752 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
753 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
754 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
755 assemble_name (FILE, (FNAME)); \
756 fprintf (FILE, ","); \
757 assemble_name (FILE, label); \
758 fprintf (FILE, "-"); \
759 assemble_name (FILE, (FNAME)); \
764 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
765 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
766 corresponds to a particular byte value [0..255]. For any
767 given byte value, if the value in the corresponding table
768 position is zero, the given character can be output directly.
769 If the table value is 1, the byte must be output as a \ooo
770 octal escape. If the tables value is anything else, then the
771 byte value should be output as a \ followed by the value
772 in the table. Note that we can use standard UN*X escape
773 sequences for many control characters, but we don't use
774 \a to represent BEL because some svr4 assemblers (e.g. on
775 the i386) don't know about that. Also, we don't use \v
776 since some versions of gas, such as 2.2 did not accept it. */
779 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
780 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
781 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
782 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
783 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
784 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
785 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
786 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
788 /* Some svr4 assemblers have a limit on the number of characters which
789 can appear in the operand of a .string directive. If your assembler
790 has such a limitation, you should define STRING_LIMIT to reflect that
791 limit. Note that at least some svr4 assemblers have a limit on the
792 actual number of bytes in the double-quoted string, and that they
793 count each character in an escape sequence as one byte. Thus, an
794 escape sequence like \377 would count as four bytes.
796 If your target assembler doesn't support the .string directive, you
797 should define this to zero.
800 #define STRING_LIMIT ((unsigned) 256)
802 #define STRING_ASM_OP ".string"
804 /* The routine used to output NUL terminated strings. We use a special
805 version of this for most svr4 targets because doing so makes the
806 generated assembly code more compact (and thus faster to assemble)
807 as well as more readable, especially for targets like the i386
808 (where the only alternative is to output character sequences as
809 comma separated lists of numbers). */
811 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
814 register unsigned char *_limited_str = (unsigned char *) (STR); \
815 register unsigned ch; \
816 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
817 for (; ch = *_limited_str; _limited_str++) \
819 register int escape; \
820 switch (escape = ESCAPES[ch]) \
826 fprintf ((FILE), "\\%03o", ch); \
829 putc ('\\', (FILE)); \
830 putc (escape, (FILE)); \
834 fprintf ((FILE), "\"\n"); \
838 /* The routine used to output sequences of byte values. We use a special
839 version of this for most svr4 targets because doing so makes the
840 generated assembly code more compact (and thus faster to assemble)
841 as well as more readable. Note that if we find subparts of the
842 character sequence which end with NUL (and which are shorter than
843 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
845 #undef ASM_OUTPUT_ASCII
846 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
849 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
850 register unsigned char *limit = _ascii_bytes + (LENGTH); \
851 register unsigned bytes_in_chunk = 0; \
852 for (; _ascii_bytes < limit; _ascii_bytes++) \
854 register unsigned char *p; \
855 if (bytes_in_chunk >= 60) \
857 fprintf ((FILE), "\"\n"); \
858 bytes_in_chunk = 0; \
860 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
862 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
864 if (bytes_in_chunk > 0) \
866 fprintf ((FILE), "\"\n"); \
867 bytes_in_chunk = 0; \
869 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
874 register int escape; \
875 register unsigned ch; \
876 if (bytes_in_chunk == 0) \
877 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
878 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
885 fprintf ((FILE), "\\%03o", ch); \
886 bytes_in_chunk += 4; \
889 putc ('\\', (FILE)); \
890 putc (escape, (FILE)); \
891 bytes_in_chunk += 2; \
896 if (bytes_in_chunk > 0) \
897 fprintf ((FILE), "\"\n"); \
901 /* All SVR4 targets use the ELF object file format. */
902 #define OBJECT_FORMAT_ELF
904 /* The maximum alignment which the object file format can support.
905 ELF doesn't have a limit, but we've got to override the default
906 (which is BIGGEST_ALIGNMENT). */
907 #define MAX_OFILE_ALIGNMENT 0x10000